A detection mechanism for detecting hole position degree and circle face profile degree

Abstract

The utility model discloses a kind of detection mechanism for detecting hole position degree and circumference surface contour, it is related to the technical field of detecting product, including including three feng percent table, the fixed ring is fixed in three feng percent table bottom, the fixed inlay is fixed in the fixed ring bottom, the fixed inlay one side is equipped with butterfly screw thread.The utility model provides in solving the synchronous detection of nut, stud position degree and its circumference surface contour on automobile parts welding, traditional detection mode, because by the limitation of detection space, only qualitative detection of surface contour can be carried out, cannot obtain actual deviation result, this mechanism is by two detection modes, it realizes position degree detection simultaneously, and also can quantitative detection surface contour deviation value, thereby providing effective data support to production, providing effective guarantee to the quality control of product.

Description

Technical Field

[0001] This utility model relates to the field of product testing technology, specifically to a testing mechanism for detecting the positional accuracy of holes and the contour accuracy of circumferential surfaces. Background Technology

[0002] This fixture is a measuring mechanism in automotive inspection tools, mainly used to inspect the position of welded nuts and studs, as well as the surface contour of their corresponding peripheral welded surfaces.

[0003] Currently, automotive inspection fixtures primarily use positional inspection pins and sleeves to inspect welded nuts and studs. However, when it is necessary to inspect the welded surface simultaneously, most fixtures use a method that combines the inspection gap with a go / no-go gauge. But as product measurement requirements increase, traditional inspection fixtures cannot meet the need to obtain the actual deviation value of the welded surface during the production process. This mechanism, through ingenious design, optimizes the originally limited measurement space by combining the positional inspection pin with the dial indicator mechanism for measuring the surface contour, thereby achieving quantitative detection of the deviation value of the welded surface contour. Utility Model Content

[0004] In view of the problems existing in the above-mentioned conversion mechanism of the perimeter surface contour, this utility model is proposed.

[0005] Therefore, the purpose of this utility model is to provide a detection mechanism for detecting the positional accuracy of holes and the contour accuracy of peripheral surfaces, which solves the problem that traditional measurement methods on inspection fixtures cannot meet the requirements when the actual deviation value of the weld surface needs to be obtained during the production process as product measurement requirements increase.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A testing mechanism for detecting the positional accuracy and circumferential surface profile of a hole includes a Mitutoyo dial indicator. A fixing ring is fixedly provided at the bottom of the Mitutoyo dial indicator, and a fixing sleeve is fixedly provided at the bottom of the fixing ring. A wing screw is threaded on one side of the fixing sleeve. A zeroing block upper is fixedly provided at the bottom of the fixing sleeve, and a zeroing block lower is fixedly provided at the bottom of the zeroing block. A spring is fixedly provided at the bottom of the zeroing block, and a pin block is fixedly provided at one end of the spring. A dial indicator head is fixedly provided at the bottom of the pin block.

[0008] Preferably, a detection pin is fixedly provided between the upper and lower parts of the zeroing block, and the detection pin is slidably connected to the pin block.

[0009] Preferably, the Mitutoyo dial indicator has a display screen fixedly mounted on its surface, and multiple control buttons are located below the display screen.

[0010] Preferably, the wing screw is a stainless steel screw.

[0011] Furthermore, high-strength plastic blocks are used on both the top and bottom of the zeroing block.

[0012] The technical effects and advantages provided by this utility model in the above technical solution are as follows:

[0013] This invention addresses the issue of simultaneously detecting the positional accuracy and circumferential contour of welded nuts and studs on automotive parts. Traditional detection methods, limited by the available space, can only perform qualitative measurements of the contour and cannot obtain actual deviation results. This new mechanism combines two detection methods, enabling both positional accuracy detection and quantitative measurement of contour deviations. This provides effective data support for production and ensures effective quality control of products. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0016] Figure 2 This is a side view of the planar structure of this utility model;

[0017] Figure 3 This is a front view of the planar structure of this utility model.

[0018] Explanation of reference numerals in the attached figures:

[0019] 1. Mitutoyo dial indicator; 2. Retaining ring; 3. Retaining sleeve; 4. Wing screw; 5. Upper zeroing block; 6. Lower zeroing block; 7. Spring; 8. Pin block; 9. Dial indicator head; 10. Detection pin; 11. Display screen; 12. Control button. Detailed Implementation

[0020] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0021] This utility model discloses a detection mechanism for detecting the positional accuracy of a hole and the contour accuracy of its circumferential surface.

[0022] This utility model provides, for example Figure 1-3The measuring mechanism shown includes a Mitutoyo dial indicator 1 for detecting hole position and circumferential surface contour. A fixing ring 2 is fixedly mounted on the bottom of the Mitutoyo dial indicator 1, and a fixing sleeve 3 is fixedly mounted on the bottom of the fixing ring 2. A wing screw 4 is threaded onto one side of the fixing sleeve 3. A zeroing block upper 5 is fixedly mounted on the bottom of the fixing sleeve 3, and a zeroing block lower 6 is fixedly mounted on the bottom of the zeroing block upper 5. A spring 7 is fixedly mounted on the bottom of the zeroing block upper 5, and a pin block 8 is fixedly mounted on one end of the spring 7. A dial indicator head 9 is fixedly mounted on the bottom of the pin block 8. The Mitutoyo dial indicator 1 at the top of the mechanism is rigidly connected to the fixing sleeve 3 via the fixing ring 2 at the bottom, forming an integrated body. The stainless steel wing screw 4 on one side of the fixing sleeve 3 can be manually tightened to further lock the fixing sleeve. The relative position of the set 3 and the lower component avoids deviations caused by loose components during testing. The stainless steel material prevents corrosion over long-term use, ensuring reliable fixation. Before testing, a zeroing assembly consisting of the upper zeroing block 5 and the lower zeroing block 6 is used to establish a zero-deviation reference for the dial indicator. The upper zeroing block 5 and the lower zeroing block 6 are made of high-strength plastic blocks, fixedly connected to form a stable calibration base. The spring 7 connected to the bottom of the upper zeroing block 5 is in a naturally extended state, pushing the lower pin block 8 and the bottom dial indicator head 9 downwards to contact the reference surface of the lower zeroing block 6. At this time, the control button 12 of the Mitutoyo dial indicator 1 is operated to zero the reading on the dial indicator display 11, completing the "zero reference" setting. Subsequent test deviation values ​​are all referenced to this reference. To ensure data accuracy, positional accuracy detection relies on detection pin 10 to quickly determine whether the hole position is qualified. The specific process is as follows: Detection pin 10 is fixed between the upper zeroing block 5 and the lower zeroing block 6. During detection, the entire mechanism is aligned with the welded nut and stud hole to be tested, and detection pin 10 is inserted vertically into the hole. If detection pin 10 can be inserted smoothly, it indicates that the welded nut is qualified. If detection pin 10 cannot be inserted or wobbles significantly after insertion, the positional accuracy is directly determined to be unqualified, eliminating the need for subsequent surface contour detection. Simultaneously, detection pin 10 and the pin block 8 are slidably connected, allowing it to move up and down within the pin block 8. This does not affect the insertion action for positional accuracy detection and provides center guidance for subsequent surface contour detection. This is the core innovative aspect of the mechanism, achieved through pressure application by spring 7 and data acquisition by a dial indicator. The traditional qualitative pass / stop test is upgraded to a quantitative deviation test. The specific process is as follows: After the positional accuracy test is completed, the spring 7 at the bottom of the zeroing block 5 continuously provides downward elastic force, pushing the pin block 8 and the dial indicator head 9 at the bottom to tightly adhere to the surface to be tested. The elastic force design of the spring 7 needs to be precisely controlled to ensure that the indicator head can follow the undulations of the welding surface in real time. The operator holds the main body of the mechanism and slowly rotates the entire mechanism around the detection pin 10 in the insertion hole as the central axis. During this process: if there are contour deviations such as protrusions or depressions on the welding surface, the dial indicator head 9 will produce a slight up-and-down displacement with the contour change. This displacement is transmitted to the spring 7 through the pin block 8, and further converted into a mechanical signal inside the Mitutoyo dial indicator 1. Finally, the dial indicator converts the displacement amount into a specific deviation value.The data is displayed in real time on screen 11, enabling quantitative detection of surface contour.

[0023] For ease of use, such as Figure 1-3 As shown, a detection pin 10 is fixedly provided between the upper 5 and lower 6 of the zeroing block, and the detection pin 10 is slidably connected to the pin block 8.

[0024] For ease of display, such as Figure 1-2 As shown, a display screen 11 is fixedly mounted on the surface of the Mitutoyo dial gauge 1, and multiple control buttons 12 are located below the display screen 11.

[0025] For ease of operation, such as Figure 1-3 As shown, the wing screw 4 is made of stainless steel.

[0026] Finally, in order to improve service life, such as Figure 1-3 As shown, the upper zeroing block 5 and the lower zeroing block 6 are made of high-strength plastic blocks.

[0027] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A testing mechanism for detecting the positional accuracy and peripheral surface profile of a hole, comprising a Mitutoyo dial indicator (1), characterized in that, The Mitutoyo dial indicator (1) is fixedly provided with a fixing ring (2) at the bottom, and a fixing sleeve (3) is fixedly provided at the bottom of the fixing ring (2). A wing screw (4) is threaded on one side of the fixing sleeve (3). A zeroing block upper (5) is fixedly provided at the bottom of the fixing sleeve (3). A zeroing block lower (6) is fixedly provided at the bottom of the zeroing block upper (5). A spring (7) is fixedly provided at the bottom of the zeroing block upper (5). A pin block (8) is fixedly provided at one end of the spring (7). A dial indicator head (9) is fixedly provided at the bottom of the pin block (8).

2. The detection mechanism for detecting hole position accuracy and circumferential surface profile according to claim 1, characterized in that, A detection pin (10) is fixedly provided between the upper (5) and lower (6) of the zeroing block, and the detection pin (10) is slidably connected to the pin block (8).

3. The detection mechanism for detecting hole position accuracy and circumferential surface profile according to claim 1, characterized in that, The Mitutoyo dial gauge (1) has a display screen (11) fixedly mounted on its surface, and a number of control buttons (12) are provided below the display screen (11).

4. The detection mechanism for detecting hole position accuracy and circumferential surface profile according to claim 1, characterized in that, The wing screw (4) is made of stainless steel.

5. The detection mechanism for detecting hole position accuracy and circumferential surface profile according to claim 1, characterized in that, The upper (5) and lower (6) zeroing blocks are made of high-strength plastic blocks.

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